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Male monarch butterfly nectaring on milkweed
Karen Richardson
Spring: January — June 2015

July, 2015
It's peak breeding season. The population builds with each new generation and will reach its peak when fall migration begins in August.

Monarch butterfly nectaring on milkweed
Darleen Horman
June 18, 2015
As migration winds down, the milkweed patch is the place to be. Egg-laying females are looking for milkweed, and males are looking for females.
Monarch Butterfly Calender Wheel for Generations June 11, 2015
Spring migration is almost complete. The population has now expanded from 3 acres of winter habitat in Mexico into 1 billion acres of breeding habitat in the US and Canada. How many generations will the monarchs produce this summer where you live?

Amy Evoniuk
June 4, 2015
The grandchildren of the monarchs from Mexico are developing now. How many generations will this summer yield?
Viceroy Butterfly Looks Like a Monarch
Donna Lorello
May 28, 2015
Fresh, new butterflies — children of the monarchs from Mexico — surged northward last week. The number of eggs reported brings a hopeful start to the summer breeding season.
Viceroy Butterfly Looks Like a Monarch
Elizabeth Howard
May 14, 2015
Watch out for imposters! This is not a monarch butterfly. How can you tell?
Monarch Butterfly Laying Eggs
Elizabeth Howard
May 7, 2015
Here comes the next generation. Eating and growing, today's monarch caterpillars will soon be northbound butterflies.
Monarch Butterfly Laying Eggs
Kim Bailey
April 30, 2015
A monarch lays eggs in your garden. What happens next?
Monarch Butterfly: Early Sighting in Minnesota
Anita Brisco
April 23, 2015
No longer their brilliant orange, the monarchs from Mexico are nearing the end of their travels. A new generation will continue the journey north.
Monarch Butterfly Laying Eggs on Milkweed
Jack Conner
April 16, 2015
With milkweed paving the way, the leading edge of the migration is now 1,500 miles from the overwintering region in Mexico. How do monarchs find milkweed?
Monarch Butterflies at Sanctuary in Mexico
Bill Jarvis
April 2, 2015
Migration enters Texas! The monarch parade began on Sunday and continued all week. What will this latest-ever arrival mean for spring production?
Monarch Butterflies at Sanctuary in Mexico
Elizabeth Howard
March 26, 2015
Here come the monarchs! Migration began with a mass exodus on Tuesday. The northbound butterflies carry the seeds of the next generation.
Monarch Butterflies
Estela Romero
March 19, 2015
Weather delays! Cold temperatures are holding the monarchs back. We're still waiting for the mass exodus from Mexico and first arrivals in Texas.
Monarch Butterflies
Estela Romero
March 12, 2015
Mating is at its peak as the monarchs get ready to head north to the breeding grounds. Mass departure is imminent.
Monarch Butterflies
Don Davis
March 5, 2015
Activity is reaching fever pitch. Within the month monarchs will vacate their winter haunt and begin the recolonization of North America.
Monarch Butterflies
Estela Romero
February 26, 2015
There's a flurry of activity now as thirsty monarchs break out of their clusters in search of water.
Monarch Butterfly in Mexico
Estela Romero

February 19, 2015
Spring is approaching for monarchs in Mexico, but last week's hail storm proved that winter's not over yet.

Monarch Butterfly in Mexico
Dr. Lincoln Brower

February 12, 2015
The monarch's winter home in Mexico is surprisingly cold. Temperatures often fall to freezing! Why do monarchs migrate to such a cold place?

Monarch Butterflies Nectaring
Randy Klauk

February 9, 2015
The U.S. government announced a $3.2 million initiative for monarch conservation.

Monarch Butterflies February 5, 2015
Monarchs from across the continent are now clustered by the millions in a small region of Mexico. This year, half of the monarchs are concentrated in only one of the 12 overwintering sites.
Monarch Butterflies January 27, 2015
Monarch population count from Mexico: Numbers remain 80% below historic levels.
Monarch Butterflies January 1, 2015
The wintering season in Mexico is underway. Scientists will measure the population in December and announce the results by March. Will the monarchs have increased from last year's record low?
Monarch sanctuary region of Mexico
Elizabeth Howard

Overview: On February 5, 2015 our season begins with news from the monarch overwintering sites in central Mexico. Monarchs leave their winter sanctuaries in March and the journey north begins. Get ready to report your sightings and track the migration on real-time maps.

Monarch Butterfly laying egg on milkweed
Frank Matheson

Explore previous migration seasons:


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